Make ntp version on sources configurable.

[davidv1992]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 76.31579% with 27 lines in your changes missing coverage. Please review.

Project coverage is 81.40%. Comparing base (6a6b18c) to head (c1a52cf).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
ntpd/src/daemon/config/ntp_source.rs	15.38%	11 Missing ⚠️
ntpd/src/daemon/config/mod.rs	73.68%	5 Missing ⚠️
ntpd/src/daemon/spawn/nts.rs	0.00%	4 Missing ⚠️
ntpd/src/daemon/spawn/nts_pool.rs	0.00%	4 Missing ⚠️
ntpd/src/daemon/keyexchange.rs	85.71%	2 Missing ⚠️
ntp-proto/src/nts_record.rs	96.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1698      +/-   ##
==========================================
+ Coverage   81.35%   81.40%   +0.05%     
==========================================
  Files          64       64              
  Lines       19753    19945     +192     
==========================================
+ Hits        16070    16237     +167     
- Misses       3683     3708      +25     

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[rnijveld]

I think we should probably add a test here that (a) tests the config parsing and (b) checks that the source is actually spawned with that ProtocolVersion specified